Date: Sun, 26 Jun 2005 15:28:35 -0600 From: Brett Glass <brett@lariat.org> To: Björn König <bkoenig@cs.tu-berlin.de> Cc: questions@freebsd.org Subject: Re: Best hardware to mirror IDE drives under FreeBSD? Message-ID: <6.2.1.2.2.20050626150740.053e8dc0@localhost> In-Reply-To: <42BF15DB.7030303@cs.tu-berlin.de> References: <200506261830.MAA29221@lariat.org> <42BF15DB.7030303@cs.tu-berlin.de>
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At 02:53 PM 6/26/2005, Björn König wrote: >You don't need an additional controller necessarily, because you can set up a RAID 1 with two single ATA hard disks. You'll find a small how-to at [1]. Even most cheap ATA chipsets have hot-swap capabilities. > >[1] http://people.freebsd.org/~rse/mirror/ > >I have good experiences with SATA PCI controllers from Highpoint. Interesting. We are not using FreeBSD 5.<anything> in production, because it seems as if 5-STABLE is only now reaching the level of stability we have come to expect from FreeBSD. (It looks as if we might be able to stop using 4-STABLE when 6.0-RELEASE or 6.1-RELEASE comes out, so long as the TCP/IP stack is re-optimized and disk performance improves by then.) So, we don't have the ability to use anything that's based on the GEOM subsystem. Nonetheless, the Web page is intriguing. Will the GEOM RAID subsystem really allow the machine to run and/or boot from either drive? It looks as if the machine is instructed to do different stages of the boot from different drives, so I'm concerned that if either drive fails a reboot might fail. The ata(4) man page mentions support for RAID 1 on Promise and Highpoint (Adaptec?) RAID controllers. These tend to be less expensive than brands like 3Ware (which I'd use for RAID5 but seems like overkill for RAID 1). Have folks had good experience with these? Will they work on 4-STABLE? --Brett
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